This is 1.5 hours long, but this man speaks the truth: sugar (fast carbs) is poison.
http://www.youtube.com/watch?v=dBnniua6-oM
The rest of this is addressed to anyone interested enough to read it:
I can also attest to the massive changes in my health after eliminating simple carbs and going for complex carbs (meaning more fiber as well) in my diet in 2003. Weight loss wasn't even a goal as I didn't even think I was near the upper end of "healthy" for my size at the time (6' and 185 lbs. at that time. I have been consistently 155 since developing a new relationship with food). The changes I made were to combat reflux. That worked. No purple pill or surgery for me and the reflux is gone.
A lot of the illnesses in western culture are clearly linked to the western diet (read Michael Pollan's book An Eater's Manifesto). The western diet is far too focused on simple/fast carbs. I believe this is largely a self feeding addiction (I believed that long before seeing the video linked above but it's nice to have a doctor confirm this). The hardest part of changing how you eat is making it to the point where your sense of taste very literally changes.
Believe it or not, if you eat the standard American diet, it's likely that your taste buds lack much sensitivity. I would not have believed it if I didn't experience it myself. Eating all of those heavily processed foods with artificial flavors that beat the hell out of your taste buds is akin to staring at a bright light for hours and then going into a darkened gallery with the most beautiful art... that you cannot see until your eyes readjust. Same thing with food. Processed and artificially flavored food is like the bright light. You aren't really tasting real food when you encounter it. That's why many of the healthier choices "lack flavor" or even "taste bad". Try going for a month without eating anything but fruits, vegetables, and high quality cuts of meat and poultry, but being heavy on the vegetables. Also avoid all sugared drinks. Just drink water or tea. I guarantee that you'll open up a whole new world of flavors and what you used to think tasted great, will be too intense.